RKI Instruments 65-2301RKSS Series User manual

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65-2301RKSS
Toxic Detector
Operator’s Manual
Part Number: 71-0273RK
Revision: A
Released: 7/17/19

65-2301RKSS Toxic Detector
WARNING
Read and understand this instruction manual before operating
detector. Improper use of the detector could result in bodily harm or
death.
Periodic calibration and maintenance of the detector is essential for
proper operation and correct readings. Please calibrate and maintain
this detector regularly! Frequency of calibration depends upon the
type of use you have and the sensor types.
Typical calibration frequencies for most applications are between 3
and 6 months, but can be required more often or less often based on
your usage.

65-2301RKSS Toxic Detector
Product Warranty
RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in materials,
workmanship, and performance for a period of one year from date of shipment from RKI Instruments,
Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of
charge. This warranty does not apply to those items which by their nature are subject to deterioration
or consumption in normal service, and which must be cleaned, repaired, or replaced on a routine
basis. Examples of such items are:
Warranty is voided by abuse including mechanical damage, alteration, rough handling, or repair
procedures not in accordance with the operator’s manual. This warranty indicates the full extent of
our liability, and we are not responsible for removal or replacement costs, local repair costs,
transportation costs, or contingent expenses incurred without our prior approval.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER
WARRANTIES AND REPRESENTATIONS, EXPRESSED OR IMPLIED, AND ALL
OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF RKI INSTRUMENTS,
INC. INCLUDING BUT NOT LIMITED TO, THE WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO
EVENT SHALL RKI INSTRUMENTS, INC. BE LIABLE FOR INDIRECT,
INCIDENTAL, OR CONSEQUENTIAL LOSS OR DAMAGE OF ANY KIND
CONNECTED WITH THE USE OF ITS PRODUCTS OR FAILURE OF ITS
PRODUCTS TO FUNCTION OR OPERATE PROPERLY.
This warranty covers instruments and parts sold to users by authorized distributors, dealers, and
representatives as appointed by RKI Instruments, Inc.
We do not assume indemnification for any accident or damage caused by the operation of this gas
monitor, and our warranty is limited to the replacement of parts or our complete goods.
a) Absorbent cartridges d) Batteries
b) Pump diaphragms and valves e) Filter elements
c) Fuses

65-2301RKSS Toxic Detector
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
65-2300RK Toxic Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting the Toxic Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Wiring the Toxic Detector to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Introducing Incoming Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Setting the Zero (Fresh Air) Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Preventive Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Replacing Components of the Toxic Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Preparing for Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Setting the Zero (Fresh Air) Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Setting the Response Reading (Span). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

65-2301RKSS Toxic Detector • 5
Overview
This manual describes the 65-2301RKSS toxic detector. This manual also describes how to install, start
up, maintain, and calibrate the toxic detector when used with a gas monitoring controller. A parts list
at the end of this manual lists replacement parts and accessories for the toxic detector.
The 65-2301RKSS detector can be used for various target gases which are listed in Table 1 below. For a
particular target gas, the part number of the toxic detector will be of the format 65-2301RKSS-XXX. For
example, 65-2301RKSS-NH3 is for ammonia (NH3) detection.
Specifications
WARNING: Do not use this product in a manner not specified in this instruction manual.
Table 1 lists specifications for the various 65-2301RKSS toxic detectors.
WARNING: When using the 65-2301RKSS, you must follow the instructions and warnings in this
manual to assure proper and safe operation of the 65-2301RKSS and to minimize the
risk of personal injury. Be sure to maintain and periodically calibrate the 65-2301RKSS
as described in this manual.
Table 1: Specifications
Target Gas 65-2301RKSS-ASH3: Arsine (AsH3)
65-2301RKSS-CL2: Chlorine (Cl2)
65-2301RKSSCL-10: Chlorine (Cl2)
65-2301RKSS-HCN: Hydrogen Cyanide (HCN)
65-2301RKSS-NH3: Ammonia (NH3)
65-2301RKSS-SO2: Sulphur Dioxide (SO2)
65-2301RKSS-PH3: Phosphine (PH3)
Sampling Method Diffusion
Detection Range AsH3: 0 - 1.50 ppm
Cl2: 0 - 3.00 ppm
Cl2: 0 - 10.0 ppm
HCN: 0 - 15.0 ppm
NH3: 0 - 75.0 ppm
SO2: 0 - 6.00 ppm
PH3: 0 - 1.00 ppm
Accuracy ± 10% of reading or ± 5% of full scale (whichever is greater)
Response Time • Cl2and NH3: T90 in 90 seconds
• All others: T90 in 45 seconds
Operating Temperature &
Humidity • 14°F to 104°F (-10°C to 40°C)
• 20% to 90% Relative Humidity

6 • 65-2301RKSS Toxic Detector
Description
This section describes the components of the 65-2301RKSS. The 65-2301RKSS includes the 65-2300RK
toxic detector and a junction box. Figure 1 below shows the components of the 65-2301RKSS.
Figure 1: 65-2301RKSS Component Location
65-2300RK Toxic Detector
The 65-2300RK toxic detector consists of the detector housing body, detector housing cap,
splashguard, cap gasket, and the plug-in sensor.
Figure 2: 65-2300RK Toxic Detector Component Location
3/4 NPT Conduit Hub
Stainless Steel
Junction Box
Toxic Detector
Locking Set Screw
Text Oriented
This Way
Splash Guard
(removable)
Sensor
(different for each detector type)
Detector Housing
Cap
Cap Gasket
Detector Housing Body
(different for each detector type)

65-2301RKSS Toxic Detector • 7
Detector Housing Body
The detector housing body protects the electronic components within the housing. Use the mounting
threads at the top of the housing to screw the toxic detector into a 3/4 NPT hub. Two wires extend
from the top of the detector housing body. Use these wires to connect the toxic detector to a controller.
One of the wires is black and one of the wires is color coded depending on the detector type. See
Figure 4 on page 9 for the color code assignments.
The housing body includes a 12 position connector at the bottom of the housing body. The plug-in
sensor mates to this connector. A pre-amplifier located between the connector and the two
interconnect wires conditions the sensor’s signal before the signal reaches the controller.
Housing Cap, Cap Gasket, & Splashguard
The housing cap screws onto the detector housing. It retains the sensor and protects it from damage. A
removable splashguard is screwed onto the detector cap to protect the sensor from impact damage,
direct water spray, and splashing. Unscrew the detector cap to access the sensor for maintenance or
replacement. A cap gasket seals the interface between the housing and cap.
Plug-in Sensor
The plug-in sensor is secured in the detector assembly by the housing cap. There is a different sensor
for each target gas. Through a series of chemical and electrical reactions, the sensor produces an
electrical output that corresponds to the detection range of the sensor.
Junction Box
The stainless steel, corrosion resistant junction box allows you to install the detector at a mounting site
that is remote from a controller, and it protects the detector wiring connections. Two conduit hubs
allow you to mount the detector to the junction box and connect the wiring from the detector to a
controller. An O-ring seals the interface between the junction box cover and the junction box base.
The terminal block within the junction box facilitates the wiring process. A cover on the front of the
junction box allows access to the interior of the junction box. A locking set screw on the junction box
cover allows you to secure the junction box cover and prevent it from being removed.
Installation
This section describes procedures to mount the toxic detector in the monitoring environment and wire
the detector to a controller.
Mounting the Toxic Detector
1. Select a mounting site that is representative of the monitoring environment. Consider the
following when you select the mounting site.
• Select a site where the detector is not likely to be bumped or disturbed. Make sure there is
sufficient room to perform start-up, maintenance, and calibration procedures.
• Select a site where the target gas is likely to be found first.
NOTE: If your application does not require a specific mounting site, mount the detector at
approximately breathing level.

8 • 65-2301RKSS Toxic Detector
Figure 3: Outline & Mounting Dimensions, 65-2301RKSS
2. At the mounting site you select, hang or mount the junction box with the detector facing down
(see Figure 3).
CAUTION: Mount the toxic detector with the detector facing down (see Figure 3.)
Wiring the Toxic Detector to a Controller
WARNING: Always verify that power to the controller is OFF before you make wiring connections.
1. Turn off the controller.
2. Turn off or unplug power to the controller.
3. Remove the junction box cover.
4. Guide a two-conductor, shielded cable or two wires in conduit through the unused conduit hub of
the junction box.
2.40
3.15
3.66
Text Oriented
ThisWay
Junction
Box
Toxic
Detector
.20 Dia. x .45
Slot, 2X
3/4 NPT
Conduit Hub
10.00 Max
1.10

65-2301RKSS Toxic Detector • 9
5. Connect the two wires to the detector using the terminal block.
CAUTION: If using shielded cable, leave the drain wire insulated and disconnected at the detector. You will
connect the opposite end of the cable’s drain wire at the controller.
6. Secure the junction box cover to the junction box.
7. Route the cable or wires leading from the toxic detector through one of the conduit hubs at the
controller housing. Use appropriate conduit fittings and construction technique for the
environmental rating of the controller. RKI controllers are typically rated NEMA 4X.
CAUTION: Do not route power and detector wiring through the same conduit hub. The power cable may
disrupt the transmission of the detector signal to the controller.
8. Connect the wires to the applicable controller terminal strip. See the controller operator’s manual
and the controller’s detector head specification sheet for the 65-2301RKSS detector.
Figure 4: Wiring the Toxic Detector to a Controller
9. If using shielded cable, connect the cable’s drain wire to an available chassis ground at the
controller. RKI controllers typically have a ground stud that is a convenient grounding location.
10. Reinstall the junction box cover.
(+) See Table
S
+
Controller Housing
Controller Detector Terminals,
Typical Designations
Gas TypeTable
AsH3 brown
CL2 yellow
CL-10 yellow
HCN white
NH3 red
PH3 green
SO2 blue
Gas Type + Wire
0-10ppmCl2
0-3ppmCl2
Shielded Cable
ESM-01 Detector
Black (S)
Terminal Strip

10 • 65-2301RKSS Toxic Detector
Start Up
This section describes procedures to start up the toxic detector and place the detector into normal
operation.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the power wiring to the controller is correct and secure. Refer to the controller
operator’s manual.
3. Turn on or plug in the incoming power, then turn on the controller.
4. Verify that the controller is on and operating properly. Refer to the controller operator’s manual.
CAUTION: Allow the detector to warm up for 5 minutes before you continue with the next section, “Setting
the Zero Reading”.
Setting the Zero (Fresh Air) Reading
CAUTION: If you suspect the presence of the target gas in the monitoring environment, use the calibration kit
and a zero air calibration cylinder to introduce “fresh air” to the toxic detector and verify an
accurate zero setting. See “Calibration” on page 14 for instructions to introduce zero air to the
detector.
1. Verify that the detector is in a fresh air environment (environment known to be free of toxic and
combustible gases, and of normal oxygen content, 20.9%).
2. Verify a reading of 0 ppm at the controller.
If the display reading is 0 ppm, start up is complete. The toxic detector is in normal operation.
If the display reading is not 0 ppm, continue with step 3.
3. Perform a zero (fresh air) adjustment operation at the controller. See the controller operator’s
manual for instructions.
Maintenance
This section describes maintenance procedures. It includes preventive maintenance, troubleshooting,
and component replacement procedures.
Preventive Maintenance
This section describes a preventive maintenance schedule to ensure the optimum performance of the
toxic detector. It includes daily and quarterly procedures.
Daily
Verify a display reading of 0 ppm at the controller. Investigate significant changes in the display
reading.
Quarterly
Calibrate the toxic detector as described in “Calibration” on page 14.